Math Fluency II addresses the Common Core Standard for Fourth Grade 4.NBT.4 that states that a student in 4th grade should fluently add and subtract multi-digit whole numbers using the standard algorithm. Multiplication is added to the problems – Addressing Common Core Standard 4.NBT.5 – Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. There are 3 variations of the worksheets with 20 sheets total. Each worksheet for 2 of the versions has 25 problems (5 problems each day or however works best for you) with boxes underneath for the students to solve the problems. 2 pages are included with all 200 problems (25/week), if you prefer you can give students a copy to keep in a folder for the entire nineweeks and then answer on another page. Both types work well with the kids. I give my kids the worksheet for the week, and they use it as early morning work (5 problems/day), and it is due on Friday. It is their daily routine and they do a wonderful job with both formats. Answer Key is provided. Math Fluency I, II, III, IV, and V are available individually or together. Hope this is helpful!!! Thank you, and have a GREAT YEAR!!!